And in fact, the particular way that Arduino repeatedly calls the loop() function makes knowing a bit about scoping nearly mandatory: all of your function-call-duration variables get wiped each ...

The Arduino ... the map() function, as you can see in this Analog In, Out Serial sample sketch. The second way to periodically change your analogWrite() value is with the for loop.

Did you know that you can use Arduino to turn on an LED when you press a button? Well, it is true, you can do this! Leaving the joke aside, let me show how you can achieve this. You will need the ...